Parallel-Plate Luneburg Lens Antenna for Broadband Multibeam Radiation at Millimeter-Wave Frequencies With Design Optimization

Chou, Hsi‐Tseng; Yan, Zhi-Da

doi:10.1109/tap.2018.2867060

Cited by 64 publications

(38 citation statements)

References 30 publications

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“…erefore, it is considerably complex and has high manufacturing cost. e design presented in this paper has similar results to those proposed in [18,19]. However, there are some advantages: the feeders are compact, inexpensive, and easy to manufacture.…”

Section: Comparative Studymentioning

confidence: 55%

“…It is possible to attend the need for high directivity and beamsteering with wideband operation using dielectric lens antennas [18,19]. In [18], a spherical lens was fed by an antipodal Fermi tapered slot antenna array to obtain beamsteering at a bandwidth of 33.3%.…”

Section: Introductionmentioning

confidence: 99%

“…In [18], a spherical lens was fed by an antipodal Fermi tapered slot antenna array to obtain beamsteering at a bandwidth of 33.3%. In [19], a Luneburg lens based on a 2D parallel-plate structure was fed by probe pins periodically arranged in a circle obtaining beamsteering at a bandwidth of 24.1%. e studies presented in [8,9] also have the capability to beamsteering over a large bandwidth, however, using a complex lens or feeder structure.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ultra-Wideband Dielectric Lens Antennas for Beamsteering Systems

Santos

Fre

Silva

et al. 2019

International Journal of Antennas and Propagation

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This paper presents a high-directivity ultra-wideband beamsteering antenna array. An innovative beamsteering system based on hemispherical dielectric lenses fed by a set of different printed antennas is proposed. Diversity of signals in different spatial positions can be radiated at the same time. A prototype was manufactured and characterized, operating in a bandwidth varying from 8 GHz to 12 GHz with gain up to 13 dBi.

show abstract

Section: Comparative Studymentioning

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ultra-Wideband Dielectric Lens Antennas for Beamsteering Systems

Santos

Fre

Silva

et al. 2019

International Journal of Antennas and Propagation

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show abstract

“…For such spherical lenses, the diameter is inversely proportional to the achievable half power beam width (HPBW). Theoretical conversion of 3-dimensional (3-D) lens action on 2-D surface has also been demonstrated via focusing beam in a limited azimuthal or elevation planes [8]. Lundberg lens principle can be re-created by varying the parallel plate spacing along the radius of a circular lens in [9], where a slot antenna is used to feed the lens and air is used as dielectric.…”

Section: Lens Based Beamformersmentioning

confidence: 99%

Constant-${\epsilon}_{r}$ Lens Beamformer for Low-Complexity Millimeter-Wave Hybrid MIMO

Abbasi

Fusco

Tataria

et al. 2019

IEEE Trans. Microwave Theory Techn.

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It is well established that the utilization of unused millimeter-wave (mmWave) spectrum is inevitable due to unavailability of required bandwidth in the conventional RF band to support the high data demands of 5G. Large antenna arrays with beamforming capabilities are required to compensate for the high path-loss at mmWave frequencies. We are at the verge of a massive mmWave radio front-end deployment and low-complexity low-cost hardware beamforming solutions are required now at this stage than ever before. In this work, one such solution is demonstrated and analyzed. A high performance and low-complexity lens based beamformer consisting of constant dielectric material (r) with antenna-feeds is presented for multibeams operation. A prototype is developed based on the classical synthesis approach, and in line with the requirements of mmWave hybrid multiuser multiple-input multiple-output (MU-MIMO) systems. A characterization at 28 GHz is performed wherein uplink signal-to-noise-ratio of user terminals is evaluated with the zero-forcing (ZF) baseband signal processing. Radiation performance of a single source beamformer is measured in an anechoic environment and end-to-end ergodic sum spectral efficiency performance is estimated based on the measured data. It is shown that the constantr based beamformer solution is simple, yet significantly outperforms conventional antenna array beamformers with analog phase shifter network, making it a promising candidate for future hybrid massive MIMO systems.

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“…In most reported works, the cylindrical Luneburg lenses are always placed between two parallel metal plates, since their electric fields are perpendicular to the metal plates while their H‐planes are converged by the Luneburg lens. Moreover, for both the planar and cylindrical H‐plane‐focused Luneburg lens antennas, radiation patterns in E‐planes are rarely presented in the previous works.…”

Section: Introductionmentioning

confidence: 99%

3D‐printed cylindrical Luneburg lens antenna for millimeter‐wave applications

Liu

Zhu

Zhang

et al. 2019

Int J RF Microw Comput Aided Eng

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A 3D-printed cylindrical Luneburg lens antenna working at 26 GHz is proposed in this article. The antenna consists of a feeding waveguide, a 3D-printed cylinder, and a pair of printed metal grids which are stuck on the side faces of the cylinder. 3D-printed structure ensures the convenience for processing and structural integrity of the Luneburg lens. Hole drilling technology is utilized for the design of the cylindrical lens. In the E-plane, conversion of spherical waves into planar waves is achieved based on the gradient refractive index which is realized by the gradient equivalent relative dielectric constant. The main part of the lens contains a hole drilling region to realize the desired equivalent permittivity from 1.23 to 2, while another gradual-thickness region realize the permittivity ranges from 1.23 to 1. Hprobe method is utilized for the optimization of the gradual-thickness region in this article. And for the H-plane, with the grids, H-field distribution is optimized compared with the Luneburg lens antenna without the loading grids. Thus, the side lobe level (SLL) in H-plane could be reduced. Meanwhile, a narrower half power beamwidth (HPBW) in H-plane will be obtained due to the metal grids. Experiment results illustrate the feasibility and validity of the proposed 3D-printed cylindrical Luneburg lens antenna. K E Y W O R D S 3D-printed, cylindrical, half power beamwidth (HPBW), hole drilling, H-probes, Luneburg lens, side lobe level (SLL)

show abstract

Parallel-Plate Luneburg Lens Antenna for Broadband Multibeam Radiation at Millimeter-Wave Frequencies With Design Optimization

Cited by 64 publications

References 30 publications

Ultra-Wideband Dielectric Lens Antennas for Beamsteering Systems

Ultra-Wideband Dielectric Lens Antennas for Beamsteering Systems

Constant-${\epsilon}_{r}$ Lens Beamformer for Low-Complexity Millimeter-Wave Hybrid MIMO

3D‐printed cylindrical Luneburg lens antenna for millimeter‐wave applications

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